1. a unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candle. 
   一支蜡烛的点光源在每英尺表面的照度的单位。
2. He is on the threshold of adulthood. 
   他即将成为大人。
3. They are on the threshold of adulthood. 
   他们即将进入成年期。
4. a logic element that performs a threshold operation. 
   能够进行开端操作的逻辑元件。
5. He was at the threshold of his career. 
   他的事业才开始。

查看更多例句 相关情景会话

• 1. 低限照度
  threshold depth 低限深度...threshold illuminance 低限照度...threshold of audibility 可??低限
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• 2. 阈照度
  adaptation illuminance 适应亮度[照度]...threshold illuminance 阈照度...详细解释 专业解释 简单解释
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